Abstract

The ion-exchange interaction of potassium iron-silicate glass with lithium nitrate melt is studied. It is established that a magnetic matrix with polymodal pore size distribution in the range of 1 nm to 10 μm is formed. No diffusion kinetics are detected in the interaction of glass with the salt melts. It is determined that the thermal history of the glass affects the composition of the phases crystallizing in it, as well as the Fe²⁺-to-Fe³⁺ ratio and their coordination. According to the Mössbauer spectroscopy data in the annealed glass, Fe³⁺ and Fe²⁺ are tetrahedrally coordinated, while Fe³⁺ and Fe²⁺ are present in the octahedral coordination and Fe₃O₄ in the quenched glass. It is determined that the initial glass 20K₂O · 12.5FeO · 12.5Fe₂O₃ · 55SiO₂, mol %, is paramagnetic. The porous matrix of the glass (20Li₂O · 12.5FeO · 12.5Fe₂O₃ · 55SiO₂, mol %) obtained as a result of the ion-exchange treatment of the glass in the LiNO₃ melt is characterized by the specific saturation magnetization of 1.8 G cm³ g^–1 and the coercive force of ≈ 80 Oe at room temperature. A composition material based on the magnetic glass matrix and ferroelectric in the pore space of the glass is produced.

中文翻译：

---

具有多孔结构的含铁磁性玻璃的离子交换形成

摘要

研究了钾铁硅酸盐玻璃与硝酸锂熔体的离子交换相互作用。已经确定形成具有多峰孔径分布在1nm至10μm范围内的磁性基质。在玻璃与盐熔体的相互作用中未检测到扩散动力学。确定玻璃的热历史影响玻璃中结晶相的组成以及Fe ²⁺ -Fe ^3+的比例及其配位。根据退火玻璃的Mössbauer光谱数据，Fe ³⁺和Fe ²⁺是四面体配位的，而Fe ³⁺和Fe ²⁺存在于八面体配位且Fe ₃ O₄在淬火玻璃中。可以确定，初始玻璃20K ₂ O·12.5FeO·12.5Fe ₂ O ₃ ·55SiO ₂（摩尔％）是顺磁性的。通过LiNO ₃熔体中的玻璃的离子交换处理而获得的玻璃的多孔基质（20Li ₂ O·12.5FeO·12.5Fe ₂ O ₃ ·55SiO ₂，摩尔％）的特征在于特定的饱和度在室温下的磁化强度为1.8 G cm ³ g ^–1，矫顽力约为80 Oe。制备基于磁性玻璃基体和玻璃的孔隙中的铁电体的组成材料。